性状 白色粉末,无气味。有碱味。有吸湿性。露置空气中逐渐吸收1mol/L水分(约15%)。400℃时开始失去二氧化碳。遇酸分解并泡腾。溶于水(室温时3.5份，35℃时2.2份)和甘油，不溶于醇。水溶液呈强碱性，pH11.6。半数致死量(30日)(小鼠中，腹腔)116.6mg/kg。有刺激性。
密度：2.53
熔点：851℃
沸点:1600℃
备注: 以上描述，仅作参考，并不表示您收到的产品，与此项描述完全相符，产品的出厂标准，请参见质量标准。
质量标准
GB/T 639-86
项目Item 优级纯 分析纯 化学纯
(GR) (AR) (CP)
含量(Na2CO3)Assay,% ≥99.8 99.8 99.8
澄清度试验Clarity 合格 合格 合格
水不溶物Insoluble matter in water,% ≤0.005 0.01 0.02
干燥失重(300℃)Drying loss,% ≤0.5 1.0 1.0
氯化物(Cl)Chloride,% ≤0.001 0.002 0.005
硫化合物(以SO4计)Sulfate compounds,% ≤0.003 0.005 0.01
氮化合物(N)Nitrogen compounds,% ≤0.001 0.001 0.002
磷酸盐及硅酸盐(以SiO3计) ≤0.0025 0.006 0.013
Phosphate and Silicate,%
镁(Mg)Magnesium,% ≤0.0005 0.002 0.005
铝(Al)Aluminum,% ≤0.001 0.003 0.01
钾(K)Potassium,% ≤0.005 0.005 0.002
钙(Ca)Calcium,% ≤0.005 0.01 0.02
铁(Fe)Iron,% ≤0.0003 0.0005 0.001
重金属(以Pb计)Heavy metals,% ≤0.0005 0.0005 0.001
GB 1255-90
项目Item 基准试剂
(PT)
含量(Na2CO3)Assay,% 99.5-100.05
澄清度试验Clarity 合格
灼烧失重Ignition loss,% ≤0.5
氯化物(Cl)Chloride,% ≤0.001
硫化合物(以SO4计)Sulfate compounds,% ≤0.003
总氮量(N)Total nitrogen,% ≤0.001
磷酸盐及硅酸盐(以SiO3计) ≤0.0025
Phosphate and Silicate,%
镁(Mg)Magnesium,% ≤0.0005
铝(Al)Aluminum,% ≤0.001
钾(K)Potassium,% ≤0.005
钙(Ca)Calcium,% ≤0.01
铁(Fe)Iron,% ≤0.0003
重金属(以Pb计)Heavy metals,% ≤0.0005
ACS级
项目名称 ACS Grade
含量(干基)Assay ≥99.5%
水不溶物Insoluble matter ≤0.01%
干燥失重（285℃）Loss on drying at 285℃ ≤1.0%
氯化物(Cl)Chloride ≤0.001%
磷酸盐(PO4)Phosphate ≤0.001%
硅酸盐（以SiO2计)Silica ≤0.005%
硫化合物(以SO4计)Sulfur compounds ≤0.003%
重金属(以Pb计)Heavy metals ≤5ppm
铁(Fe)Iron ≤5ppm
钙(Ca)Calcium ≤0.03%
镁(Mg)Magnesium ≤0.005%
钾(K)Potassium ≤0.005%
99.99% metals basis:
外观Appearance white granular powder
X-射线衍射分析X-Ray Diffraction Conforms to standard
纯度Purity ≥99.99% Based on Trace Metals Impurities of ICP
CO3 by titration with HCl ≥55.4%
痕量金属分析total metallic impurities ≤200ppm by ICP Atomic emission
99.999% metals basis:
外观Appearance white powder
X-射线衍射分析X-Ray Diffraction Conforms to standard
纯度Purity ≥99.999% Based on Trace Metals Impurities of ICP
CO3 by titration with HCl ≥55.6%
ICP: Confirms Sodium Component Confirmed
痕量金属分析total metallic impurities ≤20ppm by ICP Atomic emission
(Li、K、Cs、Sc、Mg、Ba、Al、Tl、Cr、Fe) ppm
99.9999% metals basis:
外观Appearance white powder
X-射线衍射分析X-Ray Diffraction Conforms to standard
纯度Purity ≥99.9999% Based on Trace Metals Impurities of ICP
CO3 by titration with HCl ≥55.6%
ICP: Confirms Sodium Component Confirmed
痕量金属分析total metallic impurities ≤20ppm by ICP Atomic emission
总氮total nitrogen (N) ≤10 ppm
氯chloride (Cl-): ≤10 ppm
磷酸根phosphate (PO43-): ≤5 ppm
二氧化硅silicate (as SiO2): ≤5 ppm
硫酸根sulfate (SO42-): ≤10 ppm
cation traces by ICP-MS
Al: ≤0.05 ppm
As: ≤0.01 ppm
Ba: ≤0.2 ppm
Ca: ≤0.1 ppm
Cd: ≤0.005 ppm
Co: ≤0.005 ppm
Cu: ≤0.005 ppm
Fe: ≤0.05 ppm
Hg: ≤0.005 ppm
K: ≤1 ppm
Li: ≤0.5 ppm
Mg: ≤0.1 ppm
Mn: ≤0.01 ppm
Ni: ≤0.01 ppm
Pb: ≤0.01 ppm
Sr: ≤0.1 ppm
Tl: ≤0.01 ppm
Zn: ≤0.01 ppm
贮存 密封干燥保存。
用途 定量分析中标定酸液的基准物质，测定铝、硫、铜、铅和锌。检验尿液和全血葡萄糖，分析水泥中二氧化硅的助熔剂，金属金相分析等。
高纯级用作缓冲液组分，用于去除膜蛋白。
联合国编号
Risk： R36-
Safety : S22 - S26-
Hazard : Xi -
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